Welding works are very widely used in the manufacture of metal structures and are an important stage in production.
We perform welding works using various types of welding.
Types of welding works and their features.
Welding is a complex of works with the use of special welding equipment, the main purpose of which is to create a strong and unbreakable connection between different metals by creating interatomic bonds between them. Welding is based on thermomechanical influence.
Not everyone knows that there are more than 40 types of welding work , the performance of each of which requires knowledge of certain nuances and technology, as well as safety measures. Naturally, among all the existing types of welding work, we can single out a few of the most popular ones that are in wide demand. You and I will consider them:
1. Plasma welding.
This type of welding is carried out using the influence of a high-temperature plasma jet on the welding object. Welding is based on the preliminary heating of the working gas, its subsequent ionization and the release of a hot jet on the surface of the processed material. Many rightfully consider plasma welding to be the most progressive, high-quality and modern way of joining two metals together. In which industries is plasma welding used? This is literally the case in all industries that deal with metals: automobile manufacturing, aircraft manufacturing, machine tool manufacturing, instrument manufacturing, and mechanical engineering.
What does plasma welding allow? Let’s start with the fact that this type of welding significantly saves energy resources, increases production efficiency and quality of manufactured products, is the first stage on the way to automation of production processes of enterprises of various industries. Of course, to achieve these goals, it is not enough to use only plasma welding – qualified welders who can realize all the advantages of plasma welding in practice are also needed.
What are the advantages of plasma welding? First, it is a high level of work capacity. Secondly, low sensitivity to arc oscillations. Thirdly, it is possible to use plasma welding for all metals and in each position. And the last but not the least advantages are the high speed of plasma welding and a significant range of cutting thickness. With the help of plasma welding, metals can be not only boiled, but also cut. Unlike electric arc welding, plasma welding is distinguished by the possibility of its control and the presence of highly concentrated energy immediately in the epicenter of metal heating.
2. Arc welding.
This is manual welding, which is produced using metal electrodes. This type of welding has been widely popular for quite some time, and there are reasons for that. Firstly, it is the ease of the welding process. There is nothing complicated about it – even a novice welder without significant work experience can handle it. The second advantage of arc welding is mobility. You are not tied to complex technological equipment, so you can produce arc welding even in hard-to-reach places. The third is the possibility of carrying out welding works in any spatial positions. The fourth is the ability to quickly switch from one welding material to another. The fifth is the simplicity of the welding equipment and its ease of movement. The sixth is the possibility of welding various types of steel.
And arc welding has some disadvantages. Of course, there is. Otherwise, other welding methods would simply not be used.
So, the main disadvantages of arc welding are:
- Dependence of the quality of welding on the qualification of the welder. Despite the fact that the welding process is not very complicated, it also has its own nuances that a welder must know and be able to do. The biggest difficulty in manual arc welding is the need to feed the electrode into the arc as the melting progresses, move the electrode along the seam, while making oscillating movements with this electrode, only across the seam.
- The presence of slag at the time of unilateral welding on the reverse side of the seam.
- The inability of the welder to adjust the welding speed and depth of fusion. It is for this reason that it is very often impossible to get a quality seam when welding thin metal.
Very high dependence of welding quality on the individual characteristics and qualifications of the welder, as well as low productivity – these are the main disadvantages of arc welding. But whatever you do, even seemingly perfect methods of welding have flaws.
3. Electroslag welding.
This type of welding is used in the creation of powerful turbines, drums, massive frames and thick-walled boilers. The main advantage of electroslag welding is the possibility of welding parts of any, even the largest thickness, in one pass. At the same time, the greater the thickness of the welded material, the higher the welding efficiency, since the welding itself is performed without processing the edges. This type of welding is more often used in cases where it is necessary to weld material from a thickness of 100 to 500 mm, but it is advisable to use it for metal with a thickness of 50 mm or more
The advantage of electroslag welding is the possibility of its application for almost any metal. It is most often used for welding cast iron, aluminum, titanium and copper of increased thickness. Another advantage is that for the application of this type of welding, it is not necessary to adjust the welding installation before starting to weld the next pass, as well as the absence of mandatory slag removal. In addition, using this type of welding, it is possible to achieve high efficiency of the process and higher productivity, since one or more wire electrodes are involved in the welding process, as well as an electrode of increased cross-section.
Now consider the main disadvantages of electroslag welding. First, this type of welding cannot be used for metals with a thickness of less than 16 mm. At the same time, we are not talking about economic expediency at all, but about the technical impossibility of welding. The second – for welding metal from 16 to 40 mm, electroslag welding is not economically justified and does not pay for itself. Thirdly, with electroslag welding, it is possible to perform exclusively vertical seams. And the last drawback is the need for subsequent heat treatment when welding metals with unfavorable structures. Heat treatment is mandatory to create the required properties of the welded joint.
4. Gas welding.
The first apparatus for gas welding was invented way back in 1903 in France. The metal was melted with the help of acetylene and oxygen. Despite the fact that the first gas welding machines were far from perfect, welding technology and the design of welding machines have practically not undergone changes and are still used today.
Advantages of gas welding:
- Heating and cooling of welded surfaces is slow.
- It is with the help of gas welding that it is possible to achieve the best welding of metals such as lead, copper, cast iron and brass.
- It is possible to weld metals with different flame power and melting temperature.
- Gas welding does not require an additional source of electricity or complex and expensive equipment. This allows welding even in a clean field.
- The welder can easily vary the flame temperature.
- Gas welding makes it possible not only to weld metals, but also to harden them, as well as to cut them.
- Higher strength of seams obtained by gas welding.
Has gas welding and its disadvantages, namely:
- Unlike electric arc welding, gas welding is practically not amenable to mechanization.
- Large heating zone. This can lead to damage to thermally unstable elements that are not far from the welding point.
- The use of hazardous substances in the process of gas welding. When combined with oxygen, these substances turn into explosive mixtures that pose a danger to the health and even the life of the welder.
- The impracticality of welding metals whose thickness exceeds 5 mm. This is due to the fact that the welding productivity decreases with the growth of the metal thickness.
- It will not work in any way to alloy the metal to be welded during gas welding.
- High carbon steels cannot be welded with gas welding.
5. Laser welding.
One of the common types of welding, in the process of which the laser beam affects the metal very precisely, leading to its melting.
Advantages of laser welding include:
- The minimum level of deformation and heating of parts.
- Low labor intensity (up to 20 times less than with other types of welding).
- Ability to use laser welding to weld various grades of materials, alloys and steels. Titanium, copper, high-carbon grades of steel, glass, ceramics, diamonds and plastic – all this is very easily welded with the help of laser welding.
- High productivity of laser welding.
- Ability to perform welding in different spatial positions and hard-to-reach places.
- High quality of welded joints.
- Laser welding saves materials and electricity.
- Excellent flexibility of the welding process. It will not be difficult for the welder to adjust to other welding modes if necessary.
If we talk about the disadvantages of laser welding, they include increased requirements for the quality of joint assembly and the need to purchase expensive equipment that is not affordable for every enterprise. In everything else, laser welding is one of the best methods of welding.
Which way you choose is up to you.
Welding works – welded metals
To date, there is no metal for us that we cannot weld. We can make a structure from any metal you need.
Aluminum welding . Aluminum welding is done by argon welding. Aluminum welding is a complex process. Unlike other metals, welding work on aluminum is carried out on alternating current. This is due to the presence of an oxide film on the aluminum surface. When welding aluminum, shielding gases are used – argon, helium, or a mixture of argon and helium. In the process of welding aluminum, filler wire is fed into the bath of molten metal.
Welding of stainless steel . Stainless steel is welded by argon welding or semi-automatic welding. If the thickness of the welded metal does not exceed 1.5 mm, then argon-arc welding can be used, if not, then semi-automatic. Stainless steel welding is very widely used in all areas of our life, from fence structures to manufacturing enterprises. This is due to the high anti-corrosion properties of stainless steel.
We can also weld copper, brass, titanium cast iron, alloy steels.
Welding works – production of metal structures
We have more than ten years of experience in manufacturing various metal structures. We are not intimidated by the size or volume of welding sacramento iron works. Our capabilities cover a wide range of structures for both construction and domestic purposes.
The main types of metal structures that we manufacture:
- Canopies, carports, polycarbonate canopies, summerhouse canopies, porch canopies;
- Visors, polycarbonate canopies, forged roofs, a visor over the porch;
- Fences, fences made of corrugated board, wooden fences, forged fences, metal fences;
- Gates, rolling gates, garage gates, swing gates, metal gates;
- Stairs, wooden stairs, metal stairs, spiral stairs;
- Greenhouses, polycarbonate greenhouses, metal greenhouses;
- Gazebos, metal gazebos, wooden gazebos, wrought iron gazebos, gazebos for summer cottages;
- Window bars, window bars, wrought iron bars, metal bars;
- Racks, warehouse racks, metal racks, retail racks.